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Microstructure Evolution in Directionally Solidified Fe–C–Mn–(Si) Peritectic Steels.

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Title: Microstructure Evolution in Directionally Solidified Fe–C–Mn–(Si) Peritectic Steels.
Authors: Phillion, André1 (AUTHOR) philliab@mcmaster.ca, Akintayo, Olajide1 (AUTHOR), Nabeel, Muhammad1 (AUTHOR), Podder, Angshuman1 (AUTHOR), Wang, Guang1 (AUTHOR)
Source: Steel Research International. Jun2026, Vol. 97 Issue 6, p3133-3142. 10p.
Subjects: Directional solidification, Steel, Dendritic crystals, Microstructure
Abstract: Bridgman solidification experiments are carried out on Fe–C–Mn–Si peritectic steels to clarify how growth velocity (V) and alloy composition govern microstructural evolution. At velocities of 10–120 μm s−1, the microstructures exhibit competitive growth between primary δ dendrites, are subsequently enveloped by γ‐austenite in the interdendritic regions. The primary dendrite arm spacing (PDAS) decreases systematically with increasing V but coarsens unexpectedly at intermediate growth rates in the presence of silicon. Experimental measurements are benchmarked against PDAS scaling models to assess predictive accuracy. Particular attention is given to the role of Si in modifying interfacial morphology and mushy zone characteristics. The results demonstrate that elevated Si levels, when coupled with faster growth velocities, extend the mushy zone length and are associated with increased susceptibility to interdendritic solidification cracking. These findings provide mechanistic insight into crack formation in peritectic steels and highlight composition–processing interactions critical for continuous casting practice. [ABSTRACT FROM AUTHOR]
Copyright of Steel Research International is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 194048315
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  Data: Microstructure Evolution in Directionally Solidified Fe–C–Mn–(Si) Peritectic Steels.
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  Data: <searchLink fieldCode="JN" term="%22Steel+Research+International%22">Steel Research International</searchLink>. Jun2026, Vol. 97 Issue 6, p3133-3142. 10p.
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– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Bridgman solidification experiments are carried out on Fe–C–Mn–Si peritectic steels to clarify how growth velocity (V) and alloy composition govern microstructural evolution. At velocities of 10–120 μm s−1, the microstructures exhibit competitive growth between primary δ dendrites, are subsequently enveloped by γ‐austenite in the interdendritic regions. The primary dendrite arm spacing (PDAS) decreases systematically with increasing V but coarsens unexpectedly at intermediate growth rates in the presence of silicon. Experimental measurements are benchmarked against PDAS scaling models to assess predictive accuracy. Particular attention is given to the role of Si in modifying interfacial morphology and mushy zone characteristics. The results demonstrate that elevated Si levels, when coupled with faster growth velocities, extend the mushy zone length and are associated with increased susceptibility to interdendritic solidification cracking. These findings provide mechanistic insight into crack formation in peritectic steels and highlight composition–processing interactions critical for continuous casting practice. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Steel Research International is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1002/srin.202501107
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 3133
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      – SubjectFull: Directional solidification
        Type: general
      – SubjectFull: Steel
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      – SubjectFull: Dendritic crystals
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      – SubjectFull: Microstructure
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              M: 06
              Text: Jun2026
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              Y: 2026
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